When reading the info/refs file for a repository, we have no explicit
way to detect which hash algorithm is in use because the file doesn't
provide one. Detect the hash algorithm in use by the size of the first
object ID.
Signed-off-by: brian m. carlson <sandals@xxxxxxxxxxxxxxxxxxxx>
---
remote-curl.c | 23 +++++++++++++++++++++--
1 file changed, 21 insertions(+), 2 deletions(-)
diff --git a/remote-curl.c b/remote-curl.c
index 3ed0dfec1b..35275b42e9 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -252,6 +252,19 @@ static struct ref *parse_git_refs(struct discovery *heads, int for_push)
return list;
}
+static const struct git_hash_algo *detect_hash_algo(struct discovery *heads)
+{
+ const char *p = memchr(heads->buf, '\t', heads->len);
+ int algo;
+ if (!p)
+ return NULL;
+
+ algo = hash_algo_by_length((p - heads->buf) / 2);
+ if (algo == GIT_HASH_UNKNOWN)
+ return NULL;
+ return &hash_algos[algo];
+}
+
static struct ref *parse_info_refs(struct discovery *heads)
{
char *data, *start, *mid;
@@ -262,6 +275,12 @@ static struct ref *parse_info_refs(struct discovery *heads)
struct ref *ref = NULL;
struct ref *last_ref = NULL;
+ options.hash_algo = detect_hash_algo(heads);
+ if (!options.hash_algo)
+ die("%sinfo/refs not valid: could not determine hash algorithm; "
+ "is this a git repository?",
+ url.buf);
+
data = heads->buf;
start = NULL;
mid = data;
@@ -272,13 +291,13 @@ static struct ref *parse_info_refs(struct discovery *heads)
if (data[i] == '\t')
mid = &data[i];
if (data[i] == '\n') {
- if (mid - start != the_hash_algo->hexsz)
+ if (mid - start != options.hash_algo->hexsz)
die(_("%sinfo/refs not valid: is this a git repository?"),
transport_anonymize_url(url.buf));
data[i] = 0;
ref_name = mid + 1;
ref = alloc_ref(ref_name);
- get_oid_hex(start, &ref->old_oid);
+ get_oid_hex_algop(start, &ref->old_oid, options.hash_algo);
if (!refs)
refs = ref;
if (last_ref)
